Printing machine for sensitized material



March 1, 1932. w. L. SULLlVA N 1,847,500

PRINTING'MACHINE FOR SENSITIZED MATERIAL Filed Nov. 20. 19250 2 SheetsSheet l 2 H ll at I 2 i r 2-; INVENTOR dr/az-Pen L. fiulZd cur 7111s ATTORNEY March 1, 1932. w, su v 1,847,500

PRINTING MACHINE FOR SENSITIZED MATERIAL Filed Nov. 20, 1930 2 Sheets-Sheet 2 "I Q/arrcn L xsmzldva'a M ATTORNEY Patented Mar. 1, 1932 UNITED, STATES]; PATENT OFFICE WARREN L'SULLIVAN, OF ROCHESTER, NEW YORK, ASSIGNOR TO PARAGON REVOLUTE CORPORATION, OF ROCHESTER, NEW YORK, A CORPORATION, OF NEW YORK PRINTING- MACHINE FOR SEN SITIZED MATERIAL Application filed November 20, 1980. Serial No. 496,960. I

l The present invention relates to rinting machines for sensitized material and an object thereof is to provide means readily under control of an operative to vary' the pressure of the holding belt on the light transmitting memb'er. Another object of the invention is toprovide for conditioning the sensitized material and material to be copied before presenting them to the light transmit ofsuch materials when they comeinto contact with such surface. i

"To these and other ends, the invention con sists of certain parts and combinations of parts, all of which will be hereinafter described: the novel features being pointed out in the appended claims.

" In thedrawings:

Fig, 1 is a vertical section through a print-' i'ngmachine constructed in accordance with this invention; i ii Fig. 2 is a front view of the same machine with parts broken away and thetable and associated parts being omitted in order to showthe belts or bands and thetensioning roller; and V j Fig. 3 is a detail viewof the driving mechanism taken substantially on the line 33 of Fig.t2."' "Q In the illustrated embodiment of the invention, the'frame of the machineembodies two end frames 1 suitably connected and supporting'arotary bed or cylinder'2 of light transmitting material such as glass. Within this bed is arranged an illuminating means or light source?) in the form of an'axialline of arc lamps.

' A feeding means is employed for holding the sensitized sheet and material to be copied against the light transmitting bed. In this instance, this. feeding means comprises a plurality of parallel belts or hands 4, each of which passes from a roller 5 upwardly and rearwardly behind the rotary bed 2 thence forwardly and over the top of the bed and downwardly in front of the bed to a roller 6. After passing under the roller 6, each belt passes'u'pwardly and on the outer side of a roller 7, thence upwardly in front of and over a roller" 8'rearwardly to a roller 9, thence ting member so asto prevent the expansion? downwardly around the roller 9 behind a roller 10 to and under a roller 11. From the latter each belt or band passes under a roller 12 and thence upwardly over a roller 13 and I downwardly to the under side of the roller 5. The driving of this feeding means may beeffected in any suitable manner, but it is preferred to connect power to the shaft of the roller 5 so that through the belts or bands thesensitized material and the material to be i L are discharged through the throat 14 at the under side of the roller 6.

The belts, in this'instance, are driven by the roller 5 which has a chain drive connection 35 with a shaft 37 on which a worm wheel 38' is arranged. This worm Wheel meshes with a worm 39 on a shaft 40 carrying a disk 41. The latter engages an axially movable disk 42 which engages a driving disk 43 driven by a motor 60 through an endless belt 61. Movement of the disk 42 axially gives any desired speed in the feeding belts. The disk 42is mounted to turn on. a shiftable frame 44 which, by a link 45, connects with an arm on a rocking gear segment-.46 meshing with a'sliding rack 47 which also meshes with a gear on a shaft 48. The latter carries a hand wheel 49 which, when turned, changes the speed of travel of the belts.

j The sheet of sensitized material, in this instance, passes around the edge of. and then up- Ward inv front. of a light shield ,15 which covers the belts orbands 4 above'the throat to prevent the sensitized material being affected by the light source. The copiedmaterial is discharged into the tray or receptacle 19 which projects at its rear edge into the which travelabout a'roller 17 geared to the roller 5 atone end of the machine so that the belts 16 have the same surface speed as the belts 4. The belts 16 travel above and below a rigidly supported plate 18 and also around the upper edge of the plate. The sheet material may be fed from a roll 20 supported beneath a feeding table 21 which projects forwardly from the machine below the throat 14.

One of the features of this invention is the manner in which tension is placed upon or taken off the belts to cause them to exert more or less pressure on the cylindrical bed. This tensioning means comprises a movable sup: porting means for one of the rollers in this instance 12. This supporting means, in this instance, comprises two levers 22 on which the roll 12 is journalled, said levers being piv-- oted at 23 to the frame and having pivoted at 2st to their rear ends links 25, the lower ends of which are pivoted at 27 to the forward ends of arms 28 which extend forwardly from a rock shaft 29 to which a. treadle 30 is secured. Downward pressure on the treadle serves to relieve the normal tension on the belts 1 produced by the weight of the roller 12.

Another feature of the invention is the conditioning of the sensitized material and the material to be copied (tracings, negatives and the like) so that the time these papers reach the illuminated bedthey will have a temperature approximating that of the bed so that no expansion of said material will take place during the process of printingand thereby clearer printed lines will be obtained. In this instance, a heater preferably in the form of an electric resistance, plate 31 is arranged beneath those portions of the belts passing upwardly and rearwardly from the roller 5 or below the bottom of the throat 14 so that the sheets after they are picked up by the feeding belts and before contacting with the illumlnatedbed are heated substantially to the temperature of the bed.

From the foregoing it will be seen that the sensitized sheet passes over the table 21 from the roller 20 onto the rearwardly and upwardly extending belt portion forming the bottom of the throat 14;. The material to be copied is laid on the sensitized sheet while the latter lies over the table so that the sensitized sheet and'material to be copied'both pass beneath the feeding belts 16 and over the heater or conditioner 32, to the rotary illuminated bed 2 and is carried about the latter until the roller 6 is reached when the sensitized sheet passes upwardly and thence rearwardly to the developing machine, while the copied material is deposited in the tray 19.

What I claim as my invention and desire to. secure by Letters Patent is:

1. In a machine for printing sensitized material, the combination with a light transmitting bed, and a light sourceilluminating the same, of mechanism for causing the sensitized material and the material to be copied to travel past the light source in contact with the bed comprising a plurality of endless belts having parallel portions engaging said bed, a roller about which all of said belts pass, and means movably. sup orting said roller to permit the pressure of the belts on the light transmitting bed to be varied, said means includinga pair of levers extending rearwardly fromthe said roller and having the same journaled between their front ends, said levers being fulcrinned intermediate of their ends, links pivoted to and extending downwardly from the rear ends of the levers, a rock shaft located at the backof the machine andhaving forwardly extending arms pivotally connected to the lower ends of the. said linlrs, and means for partially rotatin the rock shaft to swing the said levers an. lift the said roll.

In a machine for printing sensitized material, the combination with a rotatablymounted light transmittmg bed, and a Source.

of illumination therefor, of a plurality of belts having parallel portions contacting with said rotary bed, a roller about whichallof said belts pass, and means for. supporting said roller for movement to vary the pressure of the belts on therotary bed, said means including a pair oflevers extending rear.- wardly from the said roller and fulcrumed intermediate of their ends and having the said roller journalledbetween their front ends, links connected to and extendingdmvnwardly from the rear ends of the said leverav a rock shaftclocated at the back of the machine and having forwardly extending arms connected to the lower ends of the said links, and a treadle located beneath and extendi from the b'ack'to the front of the machine an connected at its rear end-to the saidrock shaft, said treadle being adapted to be. depressed to partially rotate the rock shaft and swing the said levers to lift the said .roll.

3. In a machine for printing sensitized material, the combination with a light transmitting bed, and a source of. illumination, of mechanism for effecting the movement of sensitized materialand material to be copied to and past the light source in contactwith said bed, and means for conditioningthe sensitized material and the material tobe-copied while such material is on the moving .mechae nism and before such material has come in contact with. the bed.

i. In a machine for printing 1 sensitized material, the combination with alight transmitting bed, and means for illuminatingsaid bed, of a plurality of beltlapslleading -ups wardly. and rearwardly from a ppintibelow 5. In a machine for printing sensitized material, the combination with a rotary light transmitting bed, and means for illuminating the same, of a feeding table projecting forward below the bed, and mechanism for moving material from the feedin table rearwardly and upwardly beneath t e bed, and thence into contact wlth the bed, said mechanism embodying a plurality of arallel belt laps extending rearwardly an n wardly from the table into contact with the ed, and means for conditioning the material as it passes rearwardly and upwardl from the table and before it contacts with t e bed, said conditioning means being arranged beneath the rearwardly and upwardly extending belt laps.

WARREN L. SULLIVAN. 

